import pygame.font

from pygame.sprite import Group

from ship import Ship

class Scoreboard():
	"""显示得分信息的类"""

	def __init__(self, ai_settings, screen, stats):
		"""初始化显示得分，涉及的属性"""
		self.screen = screen
		self.screen_rect = screen.get_rect()
		self.ai_settings = ai_settings
		self.stats = stats


		#显示得分信息 使用 的字体设置
		self.text_color = (30, 30, 30)
		self.font = pygame.font.SysFont(None, 48)


		#初始化得分图像
		self.prep_score()

		self.prep_high_score()

		self.prep_level()
		self.prep_ships()


	def prep_score(self):
		"""将得分转换为 一副 渲染的图像"""	
		rounded_score = int(round(self.stats.score, -1))
		score_str = "{:,}".format(rounded_score)

		self.score_image = self.font.render(score_str, True, self.text_color, self.ai_settings.bg_color)


		#将得分放在 屏幕右上角
		self.score_rect = self.score_image.get_rect()
		self.score_rect.right = self.score_rect.right + 20
		self.score_rect.top = 20


	def show_score(self):
		""" 在屏幕上 显示飞船  和得分"""
		self.screen.blit(self.score_image, self.score_rect)
		self.screen.blit(self.high_score_image, self.high_score_rect)
		self.screen.blit(self.level_image, self.level_rect)

		#绘制飞船
		self.ships.draw(self.screen)

	def prep_high_score(self):
		"""将最高得分转换为渲染的图像"""
		high_score = int(round(self.stats.high_score, -1))
		high_score_str = "{:,}".format(high_score)
		self.high_score_image = self.font.render(high_score_str, True,
			self.text_color, self.ai_settings.bg_color)

		#将最高得分 放在屏幕顶部中央
		self.high_score_rect = self.high_score_image.get_rect()
		self.high_score_rect.centerx = self.screen_rect.centerx
		self.high_score_rect.top = self.score_rect.top




	def prep_level(self):
		"""将等级转换为 渲染的图像"""
		self.level_image = self.font.render(str(self.stats.level),
			True, self.text_color, self.ai_settings.bg_color)

		#将等级放在得分下方
		self.level_rect = self.level_image.get_rect()
		self.level_rect.right = self.score_rect.right
		self.level_rect.top = self.score_rect.bottom + 10




	def prep_ships(self):
		"""显示剩下多少飞船"""
		self.ships = Group()
		for ship_number in range(self.stats.ships_left):
			ship = Ship(self.ai_settings, self.screen)
			ship.rect.x = 800 + ship_number * ship.rect.width
			ship.rect.y = 20
			self.ships.add(ship)